invChat: Number of individuals corresponding to a desired coverage...
In MoBiodiv/mobr: Measurement of Biodiversity
invChat R Documentation
Number of individuals corresponding to a desired coverage (inverse C_hat)
Description
If you wanted to resample a vector to a certain expected sample coverage, how
many individuals would you have to draw? This is C_hat solved for the number
of individuals. This code is a modification of INEXT's internal function
'invChat.Ind' (Hsieh et al 2016).
Usage
invChat(x, C)
Arguments
x
integer vector (species abundances)
C
coverage value between 0 and 1
Value
a numeric value which is the number of individuals for a given
level of coverage C.
References
Chao, A., and L. Jost. 2012. Coverage-based rarefaction and extrapolation:
standardizing samples by completeness rather than size. Ecology 93:2533–2547.
Anne Chao, Nicholas J. Gotelli, T. C. Hsieh, Elizabeth L. Sander, K. H. Ma,
Robert K. Colwell, and Aaron M. Ellison 2014. Rarefaction and extrapolation
with Hill numbers: a framework for sampling and estimation in species
diversity studies. Ecological Monographs 84:45-67.
T. C. Hsieh, K. H. Ma and Anne Chao. 2024.
iNEXT: iNterpolation and EXTrapolation for
species diversity. R package version 3.0.1
URL: http://chao.stat.nthu.edu.tw/wordpress/software-download/.
See Also
calc_S_C
Examples
data(inv_comm)
# What sample size corresponds to an expected sample coverage of 55%?
invChat(colSums(inv_comm), 0.55)
MoBiodiv/mobr documentation built on Oct. 26, 2024, 10:51 a.m.
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| invChat | R Documentation |
Number of individuals corresponding to a desired coverage (inverse C_hat)
Description
If you wanted to resample a vector to a certain expected sample coverage, how many individuals would you have to draw? This is C_hat solved for the number of individuals. This code is a modification of INEXT's internal function 'invChat.Ind' (Hsieh et al 2016).
Usage
invChat(x, C)
Arguments
x |
integer vector (species abundances) |
C |
coverage value between 0 and 1 |
Value
a numeric value which is the number of individuals for a given
level of coverage C.
References
Chao, A., and L. Jost. 2012. Coverage-based rarefaction and extrapolation: standardizing samples by completeness rather than size. Ecology 93:2533–2547.
Anne Chao, Nicholas J. Gotelli, T. C. Hsieh, Elizabeth L. Sander, K. H. Ma, Robert K. Colwell, and Aaron M. Ellison 2014. Rarefaction and extrapolation with Hill numbers: a framework for sampling and estimation in species diversity studies. Ecological Monographs 84:45-67.
T. C. Hsieh, K. H. Ma and Anne Chao. 2024. iNEXT: iNterpolation and EXTrapolation for species diversity. R package version 3.0.1 URL: http://chao.stat.nthu.edu.tw/wordpress/software-download/.
See Also
calc_S_C
Examples
data(inv_comm)
# What sample size corresponds to an expected sample coverage of 55%?
invChat(colSums(inv_comm), 0.55)
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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